scholarly journals Effects of Production System, Breed, Parity and Stage of Lactation on Milk Composition of Dromedary Camels in Saudi Arabia

2012 ◽  
Vol 11 (1) ◽  
pp. 141-147 ◽  
Author(s):  
Riyadh S. Aljumaa ◽  
Faris F. Almutai ◽  
Elsayed Ismail ◽  
Mohammad A. Alshaik ◽  
Ahmad Sami ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Production System ◽  
Milk Composition ◽  
Dromedary Camels ◽  
Stage Of Lactation

scholarly journals Relationship between Temperament and Stage of Lactation, Productivity and Milk Composition of Dairy Cows

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1840
Author(s):  
Ramūnas Antanaitis ◽  
Vida Juozaitienė ◽  
Vesta Jonike ◽  
Vytenis Čukauskas ◽  
Danguolė Urbšienė ◽  
...  
Keyword(s):  
Milk Fat ◽  
Genetic Correlations ◽  
Subclinical Mastitis ◽  
Milk Composition ◽  
Cow Milk ◽  
Phenotypic Correlation ◽  
Protein Ratio ◽  
Stage Of Lactation ◽  
Milk Urea ◽  
Milk Performance

The aim of this study was to assess the relationship between temperament and milk performance in cows at different stages of lactation, describing their productivity, metabolic status and resistance to mastitis. This study showed that with increasing lactation, cows’ temperament indicators decreased (p < 0.001) and they became calmer. The highest temperament score on a five-point scale was found in cows between 45 and 100 days of lactation. In the group of pregnant cows, we found more cows (p = 0.005) with a temperament score of 1–2 compared with non-pregnant cows A normal temperament was usually detected in cows with lactose levels in milk of 4.60% or more and when the somatic cell count (SCC) values in cow milk were <100,000/mL and 100,000–200,000/mL, with a milk fat-to-protein ratio of 1.2. A larger number of more sensitive and highly aggressive cows was detected at a low milk urea level. In contrast to a positive phenotypic correlation (p < 0.05), this study showed a negative genetic correlation between the temperament of cows and milk yield (p < 0.001). Positive genetic correlations between temperament scores and milk somatic cells (p < 0.001) and milk fat-to-protein ratio (p < 0.05) were found to indicate a lower genetic predisposition in cows with a calmer temperament to subclinical mastitis and ketosis. On the other hand, the heritability of temperament (h2 = 0.044–0.100) showed that only a small part of the phenotypic changes in this indicator is associated with genetic factors.

scholarly journals The influence of weather conditions on body temperature, milk composition and yields of the free-ranging dromedary camels in Southeastern rangelands of Ethiopia

2021 ◽  
Vol 7 (1) ◽  
pp. 1930932
Author(s):  
Matiwos Habte ◽  
Mitiku Eshetu ◽  
Melesse Maryo ◽  
Dereje Andualem ◽  
Abiyot Legesse ◽  
...  
Keyword(s):  
Body Temperature ◽  
Weather Conditions ◽  
Milk Composition ◽  
Dromedary Camels ◽  
Free Ranging

Effect of milk chemical composition and clotting characteristics on chemical and sensory properties of Reblochon de Savoie cheese

1997 ◽  
Vol 64 (1) ◽  
pp. 157-162 ◽  
Author(s):  
BRUNO MARTIN ◽  
JEAN-FRANÇOIS CHAMBA ◽  
JEAN-BAPTISTE COULON ◽  
ERIC PERREARD
Keyword(s):  
Chemical Composition ◽  
Milk Composition ◽  
Sensory Properties ◽  
Seasonal Differences ◽  
Nutritional Factors ◽  
Stage Of Lactation ◽  
Milk Coagulation ◽  
Quality Of Milk ◽  
Milk Characteristics

Success in making a cheese acceptable in both flavour and texture depends partly on curd properties which determine the retention of fat and moisture and, thus, cheese yield and composition (Green & Grandison, 1993). When considering farmhouse and/or Appelation d'Origine Contrôlée cheese where milk treatments are not allowed, curd properties depend only on milk composition and clotting characteristics, which are subject to wide fluctuations over the year owing to the cow's stage of lactation and nutritional factors (O'Keeffe, 1984; Macheboeuf et al. 1993). These variations often result in seasonal differences in the chemical or sensory properties of the cheese (Kefford et al. 1995) which are sometimes difficult to understand (Grandison et al. 1985). Only a few studies have assessed the cheesemaking quality of milk by actually making ripened cheese; most studies report milk coagulation properties and curd firmness.The object of this work was to study the influence of the chemical composition and clotting characteristics of the milk on the chemical and sensory properties of ripened cheeses when milk characteristics vary widely.

scholarly journals The effect of milking frequency on milk yield and milk composition in ewes

2020 ◽  
Vol 65 (No. 2) ◽  
pp. 41-50
Author(s):  
Lucia Mačuhová ◽  
Vladimír Tančin ◽  
Juliana Mačuhová
Keyword(s):  
Milk Yield ◽  
Somatic Cell Count ◽  
Storage Capacity ◽  
Milk Composition ◽  
The Other ◽  
Negative Effects ◽  
Stage Of Lactation ◽  
Milking Frequency ◽  
The Right ◽  
Main Factor

Milking frequency is the main factor regulating milk yield and milk quality if feeding, welfare, health, and environmental conditions are adequate. Milk yield and composition are substantially influenced by breed, and consequently the breed has an impact on both factors at a different frequency of milking. Further, the size of cisternal compartment plays an important role in accommodating secreted milk between milkings. Thus, ewes with large cisterns (i.e. large cisternal area, high cisternal milk percentage, and delayed tight junction opening during milk stasis) adapt themselves better to longer milking intervals than ewes with a small cistern. The increase of milking frequency from two to three times a day can lead to an increase of milk yield in the range of 3 to 36%. On the other hand, the reduction of milking frequency from twice to once a day can decrease milk yield from 9 to 67%. Two milkings per week could be omitted with no negative effects on milk yield, milk composition, and somatic cell count in ewes with large cisterns. However, besides the breed and cistern storage capacity, the results in literature show that the effects of milking frequency on milk yield and milk composition can vary according to the stage of lactation, individual animal, production level, practice of stripping, and duration of changed frequency. The right use of different milking frequency strategies can result in increased milk yield or in significant savings in labour and time spent in the milking parlour with negligible or no negative effects on milk yield and composition.

scholarly journals Circulation of influenza A viruses in dromedary camels in Saudi Arabia

2019 ◽  
Vol 12 (1) ◽  
pp. 143
Author(s):  
A. Al-Ghamdi ◽  
S. Al-amri ◽  
A. Tolah ◽  
E. Azhar ◽  
A. Hashem
Keyword(s):  
Saudi Arabia ◽  
Influenza A ◽  
Influenza A Viruses ◽  
Dromedary Camels

scholarly journals Effect of zeolite on the chemical composition of milk from Serbian spotted dairy cattle

2011 ◽  
Vol 27 (3) ◽  
pp. 993-1000
Author(s):  
R. Djokovic ◽  
Z. Ilic ◽  
M.P. Petrovic ◽  
S. Pesev ◽  
B. Ristanovic
Keyword(s):  
Chemical Composition ◽  
Dairy Cattle ◽  
Milk Fat ◽  
Milk Composition ◽  
Housing System ◽  
Control Group ◽  
Stage Of Lactation ◽  
Livestock Feed ◽  
Number Of Factors ◽  
Specific Trait

Milk yield and milk chemical composition are largely affected by the quality of dairy cattle diet. The chemical composition of milk is dependent upon a large number of factors, including breed, diet, care, housing system, stage of lactation, etc. Milk composition is primarily a breed-specific trait. This study was conducted over a period of 15 months, involving Serbian Spotted dairy cattle. The experimental animals were assigned to three groups, each receiving different levels of supplemental zeolite. The control group comprised cows that received no zeolite supplement. Experimental Groups I and II were fed compound feeds supplemented with 4% and 2% zeolite, respectively. Milk samples were analysed for the contents of milk fat, proteins, fat-free solids and lactose, and density. The results obtained suggest that zeolite supplementation affects milk chemical composition, depending on the zeolite level present in livestock feed.

scholarly journals Quality indicators of tank milk in different production systems of tropical regions

2016 ◽  
Vol 37 (4Supl1) ◽  
pp. 2819
Author(s):  
Paula Priscilla L. da Escóssia Campos ◽  
Adriano Henrique Do Nascimento Rangel ◽  
Luis Henrique Fernandes Borba ◽  
Stela Antas Urbano ◽  
Luciano Patto Novaes ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Production System ◽  
Management Practices ◽  
Production Systems ◽  
Bacterial Count ◽  
Milk Composition ◽  
Total Bacterial Count ◽  
Tropical Regions ◽  
Specialized Production ◽  
Nitrogen Concentrations

Research was conducted in eight commercial herds located in the state of Rio Grande do Norte, Brazil. Properties were classified according to the production system, the seasons were divided into four and the genetic groups into six. Milk samples from morning milking were collected monthly, directly from a cooling tank. Protein, fat, lactose, total solids, casein, urea nitrogen concentrations/levels, somatic cell count (SCC) and total bacterial count (TBC) were determined. For milk composition, the detected results were satisfactory and met the requirements of Normative Ruling 62, but the averages for SCC and TBC were above the recommended limit. All variables, with the exception of casein from total protein were influenced (P &lt; 0.05) by the production system used in the production unit. A lower fat content was recorded in 2010 compared to 2011. For the seasons, all the constituents of milk had lower values in drier season (seasons 3 and 4), with the exception of casein; SCC and TBC had higher values in periods 1 and 2, which are considered rainy periods. There was variation in the chemical composition of milk according to the genotypes. Milk chemical composition met the legal and market requirements, with a positive emphasis on specialized production systems. The variations over the year and according to the genetic group of the herd are also significant and should be taken into account in the search for improvements. As for the hygiene and health aspects of milk, the results portray the need for a greater focus by the entities involved in the sector, as well as the producers, on the viability of an adequacy program and monitoring of management practices related to this criterion.

scholarly journals Effect of the stage of lactation on milk composition, its properties and the quality of rennet curdling in East Friesian ewes

2008 ◽  
Vol 53 (No. 2) ◽  
pp. 55-63 ◽  
Author(s):  
J. Kuchtík ◽  
K. Šustová ◽  
T. Urban ◽  
D. Zapletal
Keyword(s):  
Titratable Acidity ◽  
Milk Composition ◽  
The Other ◽  
Phenotypic Correlation ◽  
Clotting Time ◽  
Milk Samples ◽  
Phenotypic Correlations ◽  
Stage Of Lactation ◽  
Sheep Farm

The evaluation of the effect of the stage of lactation on milk composition, its properties and the quality of rennet curdling was carried out over the period of three successive years using milk samples (<I>n</I> = 162) obtained from a total of 27 ewes of the East Friesian (EF) breed, reared on a small sheep farm in Juřinka in the region of Wallachia. The stage of lactation had a highly significant effect on the contents of all milk components. However, only the contents of total solids (TS), solids non-fat (SNF), fat (F), protein (P) and casein (CN) gradually increased with the advancement of lactation. The stage of lactation also had a highly significant effect both on all the properties of milk and the rennet curdling quality (RCQ). All phenotypic correlations between the particular contents of TS, SNF, F, P, CN and urea nitrogen (UN) were positive and high (<I>P</I> ≤ 0.001). On the other hand, all phenotypic correlations between milk yield and particular contents of TS, SNF, F, P, CN and UN were negative and high (<I>P</I> ≤ 0.001). The majority of phenotypic correlations between rennet clotting time (RCT) and the other particular parameters was insignificant. However, the phenotypic correlations between lactose (L) and RCT and between pH and RCT were positive and high (<I>P</I> ≤ 0.001) whereas the phenotypic correlation between titratable acidity (TA) and RCT was negative and high (<I>P</I> ≤ 0.001). The majority of phenotypic correlations between the rennet curdling quality (RCQ) and the other particular parameters was insignificant. Nevertheless, the phenotypic correlations between pH and RCQ and between RCT and RCQ were positive and high (<I>P</I> ≤ 0.001) whereas the phenotypic correlation between TA and RCQ was negative and high (<I>P</I> ≤ 0.001).

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